Electrical drive device and electrical power steering device

Abstract

Board supporting body 21A supporting circuit board 18S is provided with first terminal engaging hole 29, and circuit board 18S located so as to be adjacent to board supporting body 21A is provided with second terminal engaging hole 25. First elastic engaging portion 32 elastically engaged with first terminal engaging hole 29, and second elastic engaging portion 33 elastically engaged with second terminal engaging hole 25, are formed at press-fitting type connector terminal 27. Circuit board and board supporting body are fixedly connected together with first and second elastic engaging portions 32, 33 being elastically engaged with first and second terminal engaging holes 29, 25 respectively in a state in which press-fitting type connector terminal 27 is inserted into first and second terminal engaging holes 29, 25. With this, electrical connection of press-fitting type connector terminal and fixing (including direct or indirect fixing) of circuit board can be easily realized.

1 . An electric drive device comprising:
 an electric motor driving a mechanical control element;   a motor housing accommodating therein the electric motor; and   an electronic control unit provided at an end surface wall portion side of the motor housing which is an opposite side to an output portion of a rotation shaft of the electric motor and configured to drive the electric motor, wherein   the electronic control unit has:
 a circuit board mounting thereon electronic components that forms the electronic control unit; and 
 a board supporting body located so as to be adjacent to the circuit board and supporting the circuit board; and 
 a press-fitting type connector terminal for fixing the circuit board and the board supporting body, 
   the circuit board is provided with a first terminal engaging hole, and the board supporting body located so as to be adjacent to the circuit board is provided with a second terminal engaging hole,   a first elastic engaging portion that is elastically engaged with the first terminal engaging hole, and a second elastic engaging portion that is elastically engaged with the second terminal engaging hole, are formed so as to be adjacent to each other at the press-fitting type connector terminal, and   the circuit board and the board supporting body are fixedly connected together with the first and second elastic engaging portions being elastically engaged with the first and second terminal engaging holes respectively in a state in which the press-fitting type connector terminal is inserted into the first and second terminal engaging holes.   
     
     
         2 . The electric drive device as claimed in  claim 1 , wherein
 the electronic control unit has a power supply circuit unit configured to generate power as a main function, a power conversion circuit unit configured to drive the electric motor as a main function and a control circuit unit configured to control the power conversion circuit unit as a main function, and   the control circuit unit is mounted on the circuit board, and the press-fitting type connector terminal is connected to an earth terminal of the control circuit unit.   
     
     
         3 . The electric drive device as claimed in  claim 2 , wherein
 the press-fitting type connector terminal is inserted from a circuit board side toward the board supporting body,   the second terminal engaging hole is formed to be smaller than the first terminal engaging hole, and   according to sizes of the first and second terminal engaging holes, the second elastic engaging portion of the press-fitting type connector terminal is formed to be smaller than the first elastic engaging portion.   
     
     
         4 . An electric drive device comprising:
 an electric motor driving a mechanical control element;   a motor housing accommodating therein the electric motor; and   an electronic control unit provided at an end surface wall portion side of the motor housing which is an opposite side to an output portion of a rotation shaft of the electric motor and configured to drive the electric motor, wherein   the electronic control unit has:
 a circuit board mounting thereon electronic components that forms the electronic control unit; 
 a board supporting body supporting the circuit board; and 
 a press-fitting type connector terminal for fixing the board supporting body and a fixing portion that is formed at the end surface wall portion, 
   the board supporting body is structured to be fixed to the fixing portion,   the board supporting body supporting the circuit board is provided with a first terminal engaging hole, and the fixing portion located so as to be adjacent to the board supporting body is provided with a second terminal engaging hole,   a first elastic engaging portion that is elastically engaged with the first terminal engaging hole, and a second elastic engaging portion that is elastically engaged with the second terminal engaging hole, are formed at the press-fitting type connector terminal, and   the board supporting body and the fixing portion are fixedly connected together with the first and second elastic engaging portions being elastically engaged with the first and second terminal engaging holes respectively in a state in which the press-fitting type connector terminal is inserted into the first and second terminal engaging holes.   
     
     
         5 . The electric drive device as claimed in  claim 4 , wherein
 the press-fitting type connector terminal is inserted from a board supporting body side toward the fixing portion,   the second terminal engaging hole is formed to be smaller than the first terminal engaging hole, and   according to sizes of the first and second terminal engaging holes, the second elastic engaging portion of the press-fitting type connector terminal is formed to be smaller than the first elastic engaging portion.   
     
     
         6 . An electric drive device comprising:
 an electric motor driving a mechanical control element;   a motor housing accommodating therein the electric motor; and   an electronic control unit provided at an end surface wall portion side of the motor housing which is an opposite side to an output portion of a rotation shaft of the electric motor and configured to drive the electric motor, wherein   the electronic control unit has:
 a circuit board mounting thereon electronic components that forms the electronic control unit; 
 a board supporting body located so as to be adjacent to the circuit board and supporting the circuit board; 
 a first press-fitting type connector terminal for fixing the circuit board and the board supporting body; and 
 a second press-fitting type connector terminal for fixing the board supporting body and a fixing portion that is formed at the end surface wall portion, 
   the circuit board is provided with a first terminal engaging hole, and the board supporting body located so as to be adjacent to the circuit board is provided with a second terminal engaging hole,   a first elastic engaging portion that is elastically engaged with the first terminal engaging hole, and a second elastic engaging portion that is elastically engaged with the second terminal engaging hole, are formed so as to be adjacent to each other at the first press-fitting type connector terminal,   the circuit board and the board supporting body are fixedly connected together with the first and second elastic engaging portions being elastically engaged with the first and second terminal engaging holes respectively in a state in which the first press-fitting type connector terminal is inserted into the first and second terminal engaging holes,   the board supporting body supporting the circuit board is provided with a third terminal engaging hole, and the fixing portion located so as to be adjacent to the board supporting body is provided with a fourth terminal engaging hole,   a third elastic engaging portion that is elastically engaged with the third terminal engaging hole, and a fourth elastic engaging portion that is elastically engaged with the fourth terminal engaging hole, are formed at the second press-fitting type connector terminal,   the board supporting body and the fixing portion are fixedly connected together with the third and fourth elastic engaging portions being elastically engaged with the third and fourth terminal engaging holes respectively in a state in which the second press-fitting type connector terminal is inserted into the third and fourth terminal engaging holes, and   the first press-fitting type connector terminal and the second press-fitting type connector terminal are electrically connected to each other.   
     
     
         7 . The electric drive device as claimed in  claim 6 , wherein
 the electronic control unit has a power supply circuit unit configured to generate power as a main function, a power conversion circuit unit configured to drive the electric motor as a main function and a control circuit unit configured to control the power conversion circuit unit as a main function,   the control circuit unit is mounted on the circuit board, and the first elastic engaging portion of the first press-fitting type connector terminal is connected to an earth terminal of the control circuit unit, and   the earth terminal of the control circuit unit forms an earth circuit with the earth terminal being connected to the fixing portion from the first elastic engaging portion of the first press-fitting type connector terminal through the fourth elastic engaging portion of the second press-fitting type connector terminal.   
     
     
         8 . The electric drive device as claimed in  claim 7 , wherein
 the first press-fitting type connector terminal is inserted from a circuit board side toward the board supporting body,   the second terminal engaging hole is formed to be smaller than the first terminal engaging hole,   according to sizes of the first and second terminal engaging holes, the second elastic engaging portion of the first press-fitting type connector terminal is formed to be smaller than the first elastic engaging portion,   the second press-fitting type connector terminal is inserted from a board supporting body side toward the fixing portion,   the fourth terminal engaging hole is formed to be smaller than the third terminal engaging hole, and   according to sizes of the third and fourth terminal engaging holes, the fourth elastic engaging portion of the second press-fitting type connector terminal is formed to be smaller than the third elastic engaging portion.   
     
     
         9 . An electric power steering device comprising:
 an electric motor providing a steering assistive force to a steering shaft on the basis of an output from a torque sensor that detects a turning direction and a turning torque of the steering shaft;   a motor housing accommodating therein the electric motor;   an electronic control unit provided at an end surface wall portion side of the motor housing which is an opposite side to an output portion of a rotation shaft of the electric motor and configured to drive the electric motor; and   a cover covering the electronic control unit, wherein   the electronic control unit has:
 a circuit board mounting thereon electronic components that forms the electronic control unit; 
 a board supporting body located so as to be adjacent to the circuit board and supporting the circuit board; and 
 a press-fitting type connector terminal for fixing the circuit board and the board supporting body, 
   the circuit board is provided with a first terminal engaging hole, and the board supporting body located so as to be adjacent to the circuit board is provided with a second terminal engaging hole,   a first elastic engaging portion that is elastically engaged with the first terminal engaging hole, and a second elastic engaging portion that is elastically engaged with the second terminal engaging hole, are formed so as to be adjacent to each other at the press-fitting type connector terminal, and   the circuit board and the board supporting body are fixedly connected together with the first and second elastic engaging portions being elastically engaged with the first and second terminal engaging holes respectively in a state in which the press-fitting type connector terminal is inserted into the first and second terminal engaging holes.   
     
     
         10 . The electric power steering device as claimed in  claim 9 , wherein
 the electronic control unit has a power supply circuit unit configured to generate power as a main function, a power conversion circuit unit configured to drive the electric motor as a main function and a control circuit unit configured to control the power conversion circuit unit as a main function, and   the control circuit unit is mounted on the circuit board, and the press-fitting type connector terminal is connected to an earth terminal of the control circuit unit.   
     
     
         11 . The electric power steering device as claimed in  claim 10 , wherein
 the press-fitting type connector terminal is inserted from a circuit board side toward the board supporting body,   the second terminal engaging hole is formed to be smaller than the first terminal engaging hole, and   according to sizes of the first and second terminal engaging holes, the second elastic engaging portion of the press-fitting type connector terminal is formed to be smaller than the first elastic engaging portion.   
     
     
         12 . An electric power steering device comprising:
 an electric motor providing a steering assistive force to a steering shaft on the basis of an output from a torque sensor that detects a turning direction and a turning torque of the steering shaft;   a motor housing accommodating therein the electric motor;   an electronic control unit provided at an end surface wall portion side of the motor housing which is an opposite side to an output portion of a rotation shaft of the electric motor and configured to drive the electric motor; and   a cover covering the electronic control unit, wherein   the electronic control unit has:
 a circuit board mounting thereon electronic components that forms the electronic control unit; 
 a board supporting body supporting the circuit board; and 
 a press-fitting type connector terminal for fixing the board supporting body and a fixing portion that is formed at the end surface wall portion, 
   the board supporting body is structured to be fixed to the fixing portion,   the board supporting body supporting the circuit board is provided with a first terminal engaging hole, and the fixing portion located so as to be adjacent to the board supporting body is provided with a second terminal engaging hole,   a first elastic engaging portion that is elastically engaged with the first terminal engaging hole, and a second elastic engaging portion that is elastically engaged with the second terminal engaging hole, are formed at the press-fitting type connector terminal, and   the board supporting body and the fixing portion are fixedly connected together with the first and second elastic engaging portions being elastically engaged with the first and second terminal engaging holes respectively in a state in which the press-fitting type connector terminal is inserted into the first and second terminal engaging holes.   
     
     
         13 . The electric power steering device as claimed in  claim 12 , wherein
 the press-fitting type connector terminal is inserted from a board supporting body side toward the fixing portion,   the second terminal engaging hole is formed to be smaller than the first terminal engaging hole, and   according to sizes of the first and second terminal engaging holes, the second elastic engaging portion of the press-fitting type connector terminal is formed to be smaller than the first elastic engaging portion.   
     
     
         14 . An electric power steering device comprising:
 an electric motor providing a steering assistive force to a steering shaft on the basis of an output from a torque sensor that detects a turning direction and a turning torque of the steering shaft;   a motor housing accommodating therein the electric motor;   an electronic control unit provided at an end surface wall portion side of the motor housing which is an opposite side to an output portion of a rotation shaft of the electric motor and configured to drive the electric motor; and   a cover covering the electronic control unit, wherein   the electronic control unit has:
 a circuit board mounting thereon electronic components that forms the electronic control unit; 
 a board supporting body located so as to be adjacent to the circuit board and supporting the circuit board; 
 a first press-fitting type connector terminal for fixing the circuit board and the board supporting body; and 
 a second press-fitting type connector terminal for fixing the board supporting body and a fixing portion that is formed at the end surface wall portion, 
   the circuit board is provided with a first terminal engaging hole, and the board supporting body located so as to be adjacent to the circuit board is provided with a second terminal engaging hole,   a first elastic engaging portion that is elastically engaged with the first terminal engaging hole, and a second elastic engaging portion that is elastically engaged with the second terminal engaging hole, are formed so as to be adjacent to each other at the first press-fitting type connector terminal,   the circuit board and the board supporting body are fixedly connected together with the first and second elastic engaging portions being elastically engaged with the first and second terminal engaging holes respectively in a state in which the first press-fitting type connector terminal is inserted into the first and second terminal engaging holes,   the board supporting body supporting the circuit board is provided with a third terminal engaging hole, and the fixing portion located so as to be adjacent to the board supporting body is provided with a fourth terminal engaging hole,   a third elastic engaging portion that is elastically engaged with the third terminal engaging hole, and a fourth elastic engaging portion that is elastically engaged with the fourth terminal engaging hole, are formed at the second press-fitting type connector terminal,   the board supporting body and the fixing portion are fixedly connected together with the third and fourth elastic engaging portions being elastically engaged with the third and fourth terminal engaging holes respectively in a state in which the second press-fitting type connector terminal is inserted into the third and fourth terminal engaging holes, and   the first press-fitting type connector terminal and the second press-fitting type connector terminal are electrically connected to each other.   
     
     
         15 . The electric power steering device as claimed in  claim 14 , wherein
 the electronic control unit has a power supply circuit unit configured to generate power as a main function, a power conversion circuit unit configured to drive the electric motor as a main function and a control circuit unit configured to control the power conversion circuit unit as a main function,   the control circuit unit is mounted on the circuit board, and the first elastic engaging portion of the first press-fitting type connector terminal is connected to an earth terminal of the control circuit unit, and   the earth terminal of the control circuit unit forms an earth circuit with the earth terminal being connected to the fixing portion from the first elastic engaging portion of the first press-fitting type connector terminal through the fourth elastic engaging portion of the second press-fitting type connector terminal.   
     
     
         16 . The electric power steering device as claimed in  claim 15 , wherein
 the first press-fitting type connector terminal is inserted from a circuit board side toward the board supporting body,   the second terminal engaging hole is formed to be smaller than the first terminal engaging hole,   according to sizes of the first and second terminal engaging holes, the second elastic engaging portion of the first press-fitting type connector terminal is formed to be smaller than the first elastic engaging portion,   the second press-fitting type connector terminal is inserted from a board supporting body side toward the fixing portion,   the fourth terminal engaging hole is formed to be smaller than the third terminal engaging hole, and   according to sizes of the third and fourth terminal engaging holes, the fourth elastic engaging portion of the second press-fitting type connector terminal is formed to be smaller than the third elastic engaging portion.